<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form action="/add-user" method="post" enctype="application/x-www-form-urlencoded">
    <p>
        用户名：<input type="text" name="username" />
    </p>
    <p>
        <button>提交</button>
    </p>
</form>
</body>
</html>
